计算:(x-y)(x²+xy+y²)
计算:(xy-x²)×x-y/xy
计算:(xy-x²)乘 x-y分之xy
计算:(x-y)(x²+xy+y²)
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算:1、(xy分之x²-y²)×(x-y分之x)-(y分之x);
x²/xy-x/y
分式计算:(x²+2xy+y²)/(x²y+xy)*y/(x+y)
分解因式计算6x³y(x-y)³-4xy³(y-x)²
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算x²y³-2x(4xy³)